JP2857050B2 - Horizontal vibrating mold in continuous casting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal vibration mold in a continuous casting facility. In continuous casting, while casting molten steel in a bottomless mold, the molten steel surface in the mold is covered with powder,
This is a method of producing a slab by solidifying by primary cooling in the mold, followed by secondary cooling in the guide roll group, and drawing with a drawing roll, in order to avoid the mold surface being damaged by the drawn slab. In general, the mold is lowered in accordance with the slab withdrawing speed, then raised to the original position, and the vibration is repeatedly applied to the mold in the casting direction (vertical vibration).

On the other hand, the powder coated with a molten metal surface suppresses air oxidation and traps inclusions by the molten layer, and furthermore, the molten layer flows into the gap between the slab and the mold to rapidly cool the surface of the slab. However, if only vertical vibration in the normal casting direction is applied to the entire mold, the quality of the slab deteriorates due to poor melting of powder into the gap between the slab and the mold, and the mold copper plate and This causes breakout due to seizure of the slab, and hinders high-speed casting due to erosion of the mold copper plate.

[0003] Therefore, there has been proposed a horizontal vibration mold that applies vibration (horizontal direction) in a direction perpendicular to the casting direction to a pair of opposed long side frames constituting the mold. This horizontal vibration mold is synchronized with the vertical vibration of the mold, so that the pair of long side frames move in the closing direction when the mold descends, and move in the opening direction when the mold rises, so that the molten steel shell surface and the copper plate It is to dissolve the powder well between them.

[0004]

2. Description of the Related Art FIGS. 5 and 6 show a conventional horizontal vibration mold (for example, see Japanese Utility Model Laid-Open No. 4-83446).
Reference numerals 1 and 2 denote a pair of long side frames disposed opposite to each other, and long side copper plates 1c and 2c are attached to the inside thereof. A pair of short side frames 3 and 4 are arranged between the pair of long side frames 1 and 2 so as to face each other, and short side copper plates 3c and 4c are mounted inside the pair of short side frames 3 and 4c. The long side frames 1 and 2 are supported by guide means (not shown) so as to be movable in the horizontal direction. A hydraulic cylinder 6 for horizontal vibration is mounted between the long side frames 1 and 2 and the mold frame 5. ing. The hydraulic cylinder 6 is controlled by a servo mechanism including a servo valve, a position detector, and the like, so that the hydraulic cylinder 6 applies horizontal vibration to the long side frames 1 and 2. A short side drive cylinder 7 for adjusting the slab width is connected to the short side frames 3 and 4.

In a horizontal vibration mold using a hydraulic cylinder as described above, if a servo valve or the like is damaged or a power failure occurs, the supply of pressure oil to the horizontal vibration hydraulic cylinder is stopped, and a pair of long sides is removed. When the frame 1 is opened, molten steel is inserted into gaps between the long-side copper plates 1a, 2a and the short-side copper plates 3a, 4a, causing a problem of breakout due to seizing.
In order to solve such a problem, a pressing cylinder 50 is mounted between the long side frames 1 and 2 and the mold frame 5, and the pressing cylinder 50 is smaller than the output of the hydraulic cylinder 6 for horizontal vibration, and the molten steel in the mold is static. The long side frames 1 and 2 are always pressed with a pressure that overcomes the pressure. In this horizontal vibration mold, the pressing cylinder 50 moves following the horizontal vibration. However, when the servo valve or the solenoid of the hydraulic cylinder 6 is damaged and the supply of the pressurized oil to the hydraulic cylinder 6 is stopped, the short side frame 3, 4 can be pressed against the long side frames 1 and 2 to prevent breakout.

[0006]

In the prior art, however, the pressing cylinder 50 is made to follow the hydraulic cylinder 6 for horizontal vibration during horizontal vibration, so that an extra load is generated on the hydraulic cylinder 6 and controllability is poor. In addition, although the pressing cylinder 50 has an accumulator or the like in the hydraulic circuit as a countermeasure in the event of a power down, there is a drawback that if the piping or the like is damaged, it does not function after a certain period of time. In addition, when the horizontal vibration of the mold as described above is controlled by a hydraulic servo mechanism combining a hydraulic cylinder and a servo valve, the long side frames 1 and 2 are required if an abnormality occurs in the command signal to the servo valve for some reason. There is a risk of opening up and breaking out.

In view of such circumstances, the present invention provides a highly vibrating horizontal vibration mold that does not impose an excessive load on the horizontal vibration driving cylinder, has good controllability, and does not break out even in the event of an accident. The purpose is to provide. Another object of the present invention is to provide a horizontal vibration mold that can prevent the long side frame from opening beyond its limit during horizontal vibration operation and can be opened greatly during maintenance and inspection.

[0008]

A horizontal vibration mold according to the present invention comprises a pair of long side frames disposed opposite to each other, and a pair of short side frames disposed between the pair of long side frames. A horizontal vibration mold including a hydraulic servo mechanism for horizontally vibrating the pair of long side frames, wherein a pulling cylinder is mounted between the pair of long side frames, and the pulling cylinder is A single-acting spring-back type hydraulic cylinder, wherein a pair of long side frames are urged by a spring in a direction of attracting each other, and can be released by hydraulic pressure to release the attraction force. The power is characterized by having a force to overcome the static pressure of molten steel in the mold. Further, according to the present invention, a base frame attached to a mold frame, which is a fixing member installed outside the pair of long side frames, is inserted and removed between a use position and a retracted position on a front surface of the base frame. A stopper device comprising a stopper member, a single-acting spring-biased cylinder which is a means for inserting and removing the stopper member and which inserts the stopper member into a use position by a spring biasing force, and a base frame of the stopper device in the long side frame And a thickness-adjustable adjustment block attached at a position facing the mold, and a gap between the stopper member and the adjustment block at the use position is secured only for a necessary and sufficient distance for horizontal vibration of the mold. It is characterized by comprising a device for preventing abnormal opening of the side frame.

[0009]

According to the present invention, when the attraction cylinder is extended by the hydraulic pressure, the attraction force is released, so that the horizontal vibration of the pair of long side frames is not hindered. Therefore, no excessive load is applied to the horizontal vibration cylinder, and good controllability can be maintained. When the electric power is reduced, the hydraulic pressure of the attracting cylinder is released, and the pair of long side frames are attracted to each other by the spring. Since this attractive force has a force that overcomes the static pressure of the molten steel in the mold, no gap is generated between the long side frame and the short side frame, and no breakout occurs. When the abnormal opening prevention device is provided, when the stopper member is inserted into the use position, there is a gap between the long side frame and the mold frame that secures only a necessary and sufficient distance for horizontal vibration. Also, the horizontal vibration of the mold is not hindered, and even if the servo mechanism for horizontal vibration has an unstable operation or damage, the breakout can be prevented because the pair of long side frames does not open greatly. Then, when the stopper member is moved to the retracted position during maintenance and inspection, a large distance is left between the adjustment block and the base frame of the stopper device, so that the long side frame can be widely opened to facilitate the work.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings. The horizontal vibration mold to which the present invention is applied has the same basic structure as the conventional horizontal vibration mold shown in FIGS. 5 and 6, except that the pressing cylinder 50 is not provided. Side copper plates 1c, 2c, a pair of short side frames 3, 4,
It is the same that the short side copper plates 3c and 4c, the mold frame 5 and the horizontal vibration drive cylinder 6 are provided. 1 and 2 are side views of main parts of a horizontal vibration mold according to one embodiment of the present invention. FIG. 1 shows a state in which the long side frames 1 and 2 are attracted to each other, and FIG. Indicates the status.

In FIG. 1, 10A is an upper attracting cylinder, 10B is a lower attracting cylinder, and both are single-acting spring-back hydraulic cylinders having substantially the same structure. Reference numeral 11 denotes a cylinder tube, and a piston 13 is inserted into the compartment 12 in a liquid-tight manner, and a piston rod 14 is connected to the piston 13. A cylindrical stopper inside the compartment 12
15 is inserted, and the piston 13 moves between the stopper 15 and one end surface of the image chamber 12. Also cylindrical stopper
Disc spring around the inner circumference of the piston rod 14
Many 16 are inserted. The disc spring 16 is equivalent to the spring described in the claims, and is preferable because the occupied space is small and a strong biasing force can be obtained. However, other types of springs, such as a coil spring, may be used as long as the required urging force can be obtained. The piston-side compartment of the cylinder tube 11 is connected to a hydraulic source via a hydraulic pipe to control the supply and discharge of pressure oil.

The piston rod 14 also serves as a tie rod.
Has been concluded. The distal end of the piston rod 14 is inserted into the image chamber 22 through the hole 21 of the clamp case 20.
There is room for 14 axial movements. The spacer 17 has a larger outer diameter than the hole 21 and does not come off.

The cylinder tube 11 of the pulling cylinder 10B is fixed to a fixed block 23 fixed to the long side frame 2 with bolts or the like.
Are fixed with bolts or the like. Upper Attraction Cylinder 10
The cylinder tube 11 of A has a flange 19 and is fixed in a fixed block 23 so as not to move in the axial direction. The clamp case 20 is fixed to the long side frame 1 with bolts or the like.

A mold frame 5 which is a fixed frame is provided so as to surround the long side frames 1 and 2,
Four horizontal vibration drive cylinders 6 are mounted on the mold frame 5. And each horizontal vibration drive cylinder 6
The piston rod is fixed to the fixed block 23 and the clamp case 20 of the pulling cylinder 10B, and is fixed to the fixed block 23 and the clamp case 20 of the pulling cylinder 10A.
Each is joined.

FIG. 1 shows a disc spring 16 with a piston rod 14.
Are urged in the direction of arrow a, and the opposite long side frames 1 and 2
Indicate a state in which they are attracted to each other. FIG.
In the state where the pressure oil is supplied to the piston side picture chamber 12a in the cylinder tube 11, the disc spring 16 is compressed and the piston rod
14 is pushed in the direction of arrow b. As a result, since the rod side wall surface 23 of the image chamber 22 of the clamp case 20 and the spacer 17 are separated from each other, there is room for the long side frames 1 and 2 to freely vibrate horizontally. Therefore, in this state, no useless load is applied to the horizontal vibration drive cylinder 6, and the controllability of the horizontal vibration can be maintained well. Also, even if the servo valves etc. interposed in the pressure oil supply circuit of the attracting cylinders 10A and 10B are opened during power down, the cylinder tube
When pressure oil escapes from the piston side picture chamber 12a of 11, the disc spring 16
The opposing long side frames 1 and 2 are attracted to each other by the biasing force of the above, so that no gap is formed between the short side copper plates 3a and 4a and the long side copper plates 1a and 2a, and accidents such as breakouts are prevented beforehand. You. Since the long side frames are attracted to each other by the mechanical biasing force in this manner, the frame is excellent in fail-safe aspect. In the above embodiment, a single-acting spring-back type hydraulic cylinder is used as an example of a single-acting spring-biased hydraulic cylinder, but a single-acting spring-push hydraulic cylinder may be used instead. In this case, the biasing force of the spring may be converted into a force for attracting the pair of long side frames using a link or the like.

Next, a device for preventing abnormal opening of the mold will be described. As shown in FIG. 1, the abnormal opening prevention device 30 is provided around the piston rod of the horizontal vibration drive cylinder 6, that is, a fixed block of the drive cylinder 6 and the pulling cylinder 10A.
23, the clamp case 20, the drive cylinder 6 and the fixed block 23 of the pulling cylinder 10B, and the clamp case 20.

FIG. 3 is a side view of the abnormal opening prevention device 30, and FIG.
FIG. 4 is a view taken in the direction of arrow IV in FIG. 3 and 4, reference numeral 31 denotes a base plate, which is fixed in place on the mold frame 5 with the flange 6b of the horizontal vibration drive cylinder 6 interposed therebetween. A pair of stopper levers 33 are rotatably mounted on both sides of the upper end of the front surface of the base plate 31 with pins 32. The stopper lever 33 is a stopper member described in the claims, and has a stopper portion 34 extending downward.
The stopper portion 34 is positioned so as to sandwich the piston rod 6a of the horizontal vibration drive cylinder 6 from both sides, and opens and closes between the open position stopper 36 and the closed position stopper 37. I have. 6c is a piston rod
It is a bellows put on 6a. And the stopper lever 33
A single-acting spring-push hydraulic cylinder 40 is interposed between the two connecting portions 35. The hydraulic cylinder 40 has a cylinder tube 41, a piston 42, and a piston rod 43, and a number of disc springs 44 corresponding to springs in the claims are inserted into the piston side compartment. Therefore, when pressure oil is drained from the rod-side compartment of the hydraulic cylinder 40, the hydraulic cylinder 40 extends due to the urging force of the disc spring 44,
The stopper lever 33 is in the closed position as shown by the imaginary line,
When pressure oil is supplied to the rod-side picture chamber, the disc spring 44 is compressed and the hydraulic cylinder 40 contracts, and the stopper lever 33 is set to the open position as shown by the solid line. It should be noted that a pair of stopper levers 33 may be biased to the closed position by using a spring-back type hydraulic cylinder instead of the above-described spring-push type hydraulic cylinder. In that case, the spring-back type hydraulic cylinder may be attached to the tip end side of the stopper lever 33 from the pin 32.

On the other hand, adjustment blocks 38 and 39 are fixed to the wall surface of the fixed block 23 (and the clamp case 20) facing the horizontal vibration drive cylinder 6 with bolts or the like. In addition,
The adjustment block 39 may be a shim capable of finely adjusting the thickness. The adjustment block 39 is attached to the side of the stopper lever 33 in the closed position with a gap c therebetween. In this embodiment, the opening amount during maintenance is 10 mm.
Therefore, the horizontal vibration width of the long side frames 1 and 2 is usually
Since the thickness is 0.5 mm, the thickness t of the stopper lever 33 is set to 9 mm, and the clearance c between the adjustment block 39 and the stopper lever 33 is set to 1 mm.

In the horizontal vibration mold of the present embodiment, during operation, pressure oil is drawn from the rod-side compartment of the hydraulic cylinder 40, and a coned disc spring is used.
The stopper lever 33 is kept in the closed position by the biasing force of 44. In this state, the clearance c between the adjustment block 39 and the adjustment block 39 is 1
mm, there is no hindrance to the horizontal vibration of the long side frames 1 and 2, and the horizontal vibration drive cylinder 6
Even if an abnormality occurs in the servo valve of the long side frame 1,
2 can only be opened up to a maximum of 1 mm, so that breakout can be effectively prevented. In addition, since the hydraulic cylinder 40 is biased to the closed position by mechanical means using the disc spring 44, the hydraulic cylinder 40 is excellent in fail-safe aspects.
At the time of maintenance and inspection, pressurized oil is supplied to the rod side compartment of the hydraulic cylinder 40, and when it is contracted, the stopper lever 33 is opened, and until the adjustment block 39 contacts the base plate 31, that is, at a distance of 10 mm, the long side frames 1, 2 are moved. Can be opened.

As described above, the abnormal opening prevention device 30 of this embodiment
With the use of, it is possible to mechanically prevent the long side frames 1 and 2 from being opened during operation, so that the effect of preventing breakout is large, and the work is easy because the long side frames 1 and 2 are greatly opened during maintenance and inspection. It is what becomes. In the above embodiment, the stopper lever 33 is opened and closed so as to be inserted and removed between the use position and the retreat position. It may be inserted and removed between.

[0021]

According to the present invention, the horizontal vibration drive cylinder is not overloaded and the controllability is good, and even in the case of an unexpected accident, a breakout does not occur and the horizontal vibration mold has high safety. Can be provided.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a horizontal vibration mold according to an embodiment of the present invention.

FIG. 2 shows a drawing cylinder 10 in the horizontal vibration mold of FIG.
It is a principal part side view in the state where the attraction force of A and 10B was canceled.

3 is a side view of the abnormal opening prevention device 30. FIG.

FIG. 4 is a view taken in the direction of arrows IV in FIG. 3;

FIG. 5 is a plan view of a conventional horizontal vibration mold.

6 is a sectional view taken along the line VI of the horizontal vibration mold of FIG. 5;

[Explanation of symbols]

1 long side frame 2 long side frame 3
Short side frame 4 Short side frame 5 Mold frame 6
Horizontal vibration drive cylinder 10A Attraction cylinder 10B Attraction cylinder 16
Belleville spring 20 Clamp case 23 Fixed block 30
Abnormal opening prevention device 33 Stopper lever 40 Hydraulic cylinder 38
Adjustment block 39 Adjustment block

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor, Nagayasu, Nagayasu 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Engineering Co., Ltd. (72) Inventor Toru Suga 5-2 Sokai-cho, Niihama-city, Ehime Prefecture Sumitomo Heavy Industries, Ltd. 5-2 Sokai-cho, Niihama, Niihama, Ehime No. Sumitomo Heavy Industries, Ltd. Niihama Works (56) References JP-A-5-245589 (JP, A) JP-A-3-99756 (JP, A) JP-A-3-57538 (JP, A) JP Hei 2-127945 (JP, A) Actually open Hei 4-83445 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B22D 11/04 315

Claims (2)

(57) [Claims] 1. A mold chamber comprising a pair of long side frames disposed opposite to each other and a pair of short side frames disposed between said pair of long side frames. A horizontal vibration mold having a hydraulic servo mechanism for horizontally vibrating a frame, wherein a pulling cylinder is mounted between the pair of long side frames, and the pulling cylinder is a single-acting spring-biased hydraulic cylinder, A pair of long side frames are urged by a spring in a direction of attracting each other, and the attraction force can be released when the pair of long side frames are extended by hydraulic pressure.The urging force of the spring is a force that overcomes the static pressure of molten steel in the mold. A horizontal vibrating mold in a continuous casting facility, comprising: 2. A base frame attached to a mold frame, which is a fixing member provided outside the pair of long side frames, and a stopper inserted and removed between a use position and a retracted position on a front surface of the base frame. A stopper device comprising a member, a single-acting spring-biased cylinder which is a means for inserting and removing the stopper member and which inserts the stopper member into a use position by a spring biasing force, and a base frame of the stopper device in the long side frame. It consists of a thickness-adjustable adjustment block attached to the opposite position,
2. The horizontal vibrating mold according to claim 1, further comprising a device for preventing abnormal opening of the long side frame, wherein a clearance between the stopper member and the adjustment block at the use position secures only a necessary and sufficient distance for horizontal vibration of the mold.